If you've got a 3" aftermarket ypipe bolted to the 2.5" stock exhaust, consider this very simple fix that will most certainly reduce turbulence and power loss, and also clean up the sound a bit:

http://g35driver.com/forums/showthread.php?t=41690

I know this is not a new idea, but bailyrx on g35driver did some homework and found quality sources for the parts and labor. I did this fix and it turned out great. After my welder was done he showed me the old bpipe flange and there was a 1/4" black ring around it where the exhaust was slamming into it. Not good.

 

thanx for this post. i have the ut ypipe and stock bpipe, too. when ordering the flange, does one need to know the distance btwn the bolt holes, or is it standard for a 3" ypipe?
ps: sorry i called you "cobalt" earlier; that's just what my eyes saw at first.

 

I spoke with Chuck at Dr Gas and asked him to weld the 3/2.5 reducer cone onto a 3" 2-bolt flange. For reference here is their reducer cone page that also mentions the flanges, I think they are pretty much standard size. With parts and labor it came to $35.

Heh I didn't even notice the name thing. I go by copbait on the G forum but that name was already taken here. I had to go with copba1t on the plate I just ordered as well. Those Bhastids!

 

thanx. i'll call him tomorrow. i'm thinking this mismatch might be contributing to the rasp i'm hearing.

 

Yup that was the case with mine as well, cleaned up the sound very nicely.